Question 668324
5n+2n=5(n+20)
7n=5(n+20)
7n=100+5n
7n-5n=(5n-5n)+100
2n=(5n-5n)+100
5n-5n=0
2n=100
n=100/2
you can do long division to simplify
2 divided by 100=50
n=50